package collection;

import java.util.ArrayList;
import java.util.List;

/**
 * List subList(int start,int end)
 * 获取当前List集合中指定范围内的子集。注意，两个数字表示范围(含头不含尾)
 * @author XingHaiYang
 * @date 2022/9/13 15:31
 */
public class ListDemo3 {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>();
        for(int i=0;i<10;i++){
            list.add(i);
        }
        System.out.println(list);
        //获取[3-7]
        List<Integer> subList = list.subList(3,8);
        System.out.println(subList);
        //将子集元素扩大10倍
        for(int i=0;i<subList.size();i++){
//            int num = subList.get(i);
//            num = num * 10;
//            subList.set(i,num);
            subList.set(i,subList.get(i)*10);
        }
        System.out.println(subList);//[30,40,50,60,70]
        //对子集的操作就是对原集合对应元素的操作
        System.out.println(list);

        //删除[2-8]
        list.subList(2,9).clear();
        System.out.println(list);
    }
}
